/**
 * 获取url参数
 */
function UrlParam() {
	let name, value, str = location.href,
		num = str.indexOf("?"); //取得整个地址栏
	str = str.substr(num + 1); //取得所有参数 stringvar.substr(start [, length ]
	let arr = str.split("&"); //各个参数放到数组里
	//console.log(arr)
	for(let i = 0; i < arr.length; i++) {
		num = arr[i].indexOf("=");
		if(num > 0) { 
			name = arr[i].substring(0, num);
			value = arr[i].substr(num + 1);
			this[name] = value;
		}
	}
}
Vue.prototype.$params=new UrlParam();